linux-kernel - Re: "rcu: React to callback overload by aggressively seeking quiescent states" hangs on boot

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Message-Id: <CAA6354A-C747-4BE0-8EDC-C06E3C1D7D08@lca.pw>
Date:   Fri, 13 Dec 2019 18:11:16 -0500
From:   Qian Cai <cai@....pw>
To:     paulmck@...nel.org
Cc:     "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Tejun Heo <tj@...nel.org>,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>, rcu@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: "rcu: React to callback overload by aggressively seeking quiescent states" hangs on boot



> On Dec 13, 2019, at 5:46 PM, Paul E. McKenney <paulmck@...nel.org> wrote:
> 
> I am running this on a number of x86 systems, but will try it on a

The config to reproduce includes several debugging options that might required to recreate.

> wider variety.  If I cannot reproduce it, would you be willing to
> run diagnostics?

Yes.

> 
> Just to double-check...  Are you running rcutorture built into the kernel?
> (My guess is "no", but figured that I should ask.)

No as you can see from the config I linked in the original email.